import java.awt.*;
import java.awt.event.*;
import utilities.*;

public class DeadLockDialog implements ActionListener {

private static DeadLockDialog it;

private static Frame window;
private static Label msgLabel;

private static Thread client;

static {
	it = new DeadLockDialog();		// singleton !
}
//-------------------------------------------------------------------
// DeadLockDialog Constructor
//-------------------------------------------------------------------
private DeadLockDialog() {

	window	 = new Frame("");
	msgLabel = new Label("dummy", Label.CENTER);
	Button dismiss = new Button("   OK   ");

	dismiss.addActionListener(this);

	Panel buttonPanel = new Panel();
	buttonPanel.add(dismiss);

	window.add("Center", msgLabel);
	window.add("South" , buttonPanel);
}
//-------------------------------------------------------------------
// Convenient static method to call up a dialog at any time, any place.
//-------------------------------------------------------------------
public static void popup(String message) {

	msgLabel.setText(message);
	window.pack();

	window.setVisible(true);

	client = Thread.currentThread();

	// like a sleeping beauty, go to sleep forever
	// only actionPerformed() can awaken us
	MiscKit.delay(Long.MAX_VALUE);
}
//-------------------------------------------------------------------
// ActionListener interface method
//-------------------------------------------------------------------
public void actionPerformed(ActionEvent actionEvent) {

	window.setVisible(false);

	// client thread went into a deep sleep, interrupt sleep.
	client.interrupt();
}
//-------------------------------------------------------------------
// main() entry point
//-------------------------------------------------------------------
public static void main (String[] args) {

	DeadLockDialog.popup("Hello, I'm a philosophical dialog!");
	MiscKit.delay(1000);
	DeadLockDialog.popup("Hello, I'm another philosophical dialog!");
	MiscKit.delay(1000);
	DeadLockDialog.popup("Hello, yes.. I too am a philosophical dialog!");

	System.exit(0);
}
} // End of Class DeadLockDialog